* SSA/ASS common funtions
* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "ass.h"
+#include "libavutil/avstring.h"
+
+/**
+ * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS.
+ *
+ * @param avctx pointer to the AVCodecContext
+ * @param font name of the default font face to use
+ * @param font_size default font size to use
+ * @param color default text color to use (ABGR)
+ * @param back_color default background color to use (ABGR)
+ * @param bold 1 for bold text, 0 for normal text
+ * @param italic 1 for italic text, 0 for normal text
+ * @param underline 1 for underline text, 0 for normal text
+ * @param alignment position of the text (left, center, top...), defined after
+ * the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top)
+ * @return >= 0 on success otherwise an error code <0
+ */
+static int ff_ass_subtitle_header(AVCodecContext *avctx,
+ const char *font, int font_size,
+ int color, int back_color,
+ int bold, int italic, int underline,
+ int alignment)
+{
+ char header[512];
+
+ snprintf(header, sizeof(header),
+ "[Script Info]\r\n"
+ "ScriptType: v4.00+\r\n"
+ "\r\n"
+ "[V4+ Styles]\r\n"
+ "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n"
+ "Style: Default,%s,%d,&H%x,&H%x,&H%x,&H%x,%d,%d,%d,1,1,0,%d,10,10,10,0,0\r\n"
+ "\r\n"
+ "[Events]\r\n"
+ "Format: Layer, Start, End, Text\r\n",
+ font, font_size, color, color, back_color, back_color,
+ -bold, -italic, -underline, alignment);
+
+ avctx->subtitle_header = av_strdup(header);
+ if (!avctx->subtitle_header)
+ return AVERROR(ENOMEM);
+ avctx->subtitle_header_size = strlen(avctx->subtitle_header);
+ return 0;
+}
+
+int ff_ass_subtitle_header_default(AVCodecContext *avctx)
+{
+ return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT,
+ ASS_DEFAULT_FONT_SIZE,
+ ASS_DEFAULT_COLOR,
+ ASS_DEFAULT_BACK_COLOR,
+ ASS_DEFAULT_BOLD,
+ ASS_DEFAULT_ITALIC,
+ ASS_DEFAULT_UNDERLINE,
+ ASS_DEFAULT_ALIGNMENT);
+}
void ff_ass_init(AVSubtitle *sub)
{
rects[sub->num_rects]->type = SUBTITLE_ASS;
rects[sub->num_rects]->ass = av_malloc(len + dlen + 1);
strcpy (rects[sub->num_rects]->ass , header);
- strncpy(rects[sub->num_rects]->ass + len, dialog, dlen);
- rects[sub->num_rects]->ass[len+dlen] = 0;
+ av_strlcpy(rects[sub->num_rects]->ass + len, dialog, dlen + 1);
sub->num_rects++;
return dlen;
}